Which of the following can be used to reduce voltage surges?

A voltage regulator is designed to maintain a consistent output voltage despite variations in input voltage or load conditions. It can effectively filter out voltage surges and provide a steady voltage supply to sensitive electronic devices. By regulating the voltage, it protects components from potential damage caused by unexpected spikes in voltage, ensuring reliable operation.

While fuses are important for protecting circuits from overloads by breaking the circuit when excessive current flows, they do not specifically address voltage surges. Transformers primarily change voltage levels while maintaining the power level; they do not directly mitigate surges. Capacitors can help smooth out voltage fluctuations in a circuit, but they are not specifically designed to protect against surges in the same way a voltage regulator does.